ssh port forwarding error

I have two Linux servers and one Mac client, and I would like to do SSH port forwarding via local port address on the Mac. In Terminal 1 on the Mac, localhost:~ user1$ ssh -L 8022:server2:22 server1 and from Terminal 2 on the same Mac localhost:~ user1$ scp -P 8022 0.0.0.0:file . works OK. But if I use another account user2 on the Mac, localhost:~ user2$ ssh -L 8022:user1@server2:22 user1@server1 I get the following error on Terminal 2. localhost:~ user1$ scp -P 8022 0.0.0.0:file . ssh_exchange_identification: Connection closed by remote host At the same time, another error message appears in Terminal 1. channel 3: open failed: administratively prohibited: open failed Either user1 or user2 does not have any special port forwarding settings in /etc/sshd_config, /etc/ssh_config, or ~/.ssh/config. Both users have access for SSH login to the Mac (i.e., in "Remote Login" panel of System Preference, these users are in the white list). I don't see any message in /var/log/system.log. Which configuration should I check? I use OS X Yosemite. --- Here is the verbose output of the scp command. Executing: program /usr/bin/ssh host 0.0.0.0, user (unspecified), command scp -v -f file OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011 debug1: Reading configuration data /etc/ssh_config debug1: /etc/ssh_config line 20: Applying options for * debug1: /etc/ssh_config line 102: Applying options for * debug1: Connecting to 0.0.0.0 [0.0.0.0] port 8022. debug1: Connection established. debug1: identity file /Users/cta/.ssh/id_rsa type -1 debug1: identity file /Users/cta/.ssh/id_rsa-cert type -1 debug1: identity file /Users/cta/.ssh/id_dsa type -1 debug1: identity file /Users/cta/.ssh/id_dsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.2 ssh_exchange_identification: Connection closed by remote host